Concrete-block machine



July 10, 1923. 1,461,413 v R. s. COHOON I CONCRETE BLOCK MACHINE Filed March 18, 1922 2 Sheets-Sheet 1 R. S. COHOON CONCRETE BLOCK MACHINE 7 July 10, 1923. V v 1,461,413

Filed March 18, 1922 2 Sheets- Sheet 2 Patented July 10, 1923.

' STATE Lima.

TENT

Bonner s. COHO0N,.OF ORLANDO. FLOR-IDA, assro von TO s awee CEMENT MA- cn nn COMPANY, or ORLANDO, FLORIDA, A oonrona'rron or FLORIDA.

concnnrn-enoox MACHINE.

Application filed March 18, 1822. Serial No. 544,711; 1

T 0 all whom it may concern: 1

Be it known that I, ROBERT S. CoHooN, a citizen of the United States, residing at Orlando, in the county of Orange and State of Florida, have invented certain new and useful Improvements in Concrete-Block Machines, of which the following is a specification.

My invention relates to concrete block machines and has for one of its objects the provision of simple and efficient means for striking off the top of the material in the form.

A further object is'the provision of simple and efficient means for usingt-he material struckotf from the top of one block for use in forming the next block.

Another object is the provision of simple and eflicient means for maintaining the parts of the form or mold in rigid positions during the forming of the block.

Another object is the provision of simple.

and eflicient means fore-losing the core open.- ing in the block-when it is desired to form solid blocks.

Another object is the provision of means for automatically locking the sides of the mold upon movingthe cores to operative positions.

Other objects will appear hereinafter. An embodiment of my invention is illus trated in the accompanying drawings form? ing a part of this specification, and in whichi Fig. 1 is a plan view of a concrete block machine embodying my invention; I 1

Fig. 2 is a similar view, but showing some of theparts removed to expose the frame of the device; I Fig. 3 is a closure used for closing the core openings; 2

Fig. 4 is an end elevation of the device; Fig. 5 is a fragmental enlarged section showing details of the construction;

F ig. 6 is a fragmental section showing the core opening closure in position; and

Fig. 7 is an adjustable locking plate used in the construction.

Referring more particularlyto the drawings, I have indicated a frame made up of end pieces 8 and 9 secured together by longitudinally extending bars 10 and 119-. The

bars 11 formguides upon which tri-angu larly shaped frames 12 and 13.are mounte'd,

substantially like the mountings in United States Patent No. 1.2%1288. dated September 25, 1917, granted to SD. Lindsay. .At adjacent corners of the frames 12 and 13 are pins or bolts li'which engage slots, 15gof a hand lever 16. The latter is pivoted as at 17 intermediate the pins 1 1 so that swinging of the lever from its full line' to its dotted line positions of Fig. 2 will move the outer parallel sides 18'ofthe tri-angular fr ames12 and 13 from their full to their dotted line positions of saidfigure.

Onone of the rods 10 is pivoted an-angu-,

lar member 19 which carries a plate 20, and the'latte'r forms the bottom of the mold during the forming of the block. The two angular members, one adjacent each'end of the mold are provided with tongue and grooved I connections 21 with a pallet 22. In the construction of blocks, the blocks whenformed, are left on pallets 22 so that for each block a new pallet 22 must be placed on themembers 19. The pivotal mounting of the members 19 provides means for easily moving the block from the position in which these parts are disposed for'makingthe block, such as indicated in Fig. 4, to the position where the block is removed from the machine, which move a block.

Back of the plate 25' and near the ends Sand 9 of the frame are two guide rods 27', one of which is indicated ,in the drawings.

Mounted upon the guide rods 27 is a, core holder 28. .To the core holder 28 is secured a pluralityof cores 29.. The cores,.29 may be secured by means of screws 30- to -their mountings 28, or in anyzde'sirable manner. On the plate 25is a lip 31 which facilitates guiding the cores into the openings 26. Two

levers 32 are pivoted on one of the rods 10. as clearly indicated in Figs. 4 and 5, and are connected to the core mounting 28 by means of links 33. The upper ends of levers 32 are connected together by a rod 34. On the rod 34 are mounted cams 35 adapted to engage cams 36 on the members 19 so that when the latter are in their position shown in Fig. 4 the cams 35 will engage the cams 36 and hold the members 19, 20 and 22 in rigid relation with the frame. The cams 35 are adjustably mounted by means of set screws 37, or their equivalent, so as to vary the relation between the cams 35 and 36 when desired.

On adjacent sides of the levers 32 are frames 38 which are adapted to engage cam lugs 39 on the end plates 23 of the mold so that when the levers 32 are in their positions indicated in Fig. 4 the frames 38 will be in engagement with cam lugs 39 rigidly locking the end plates 23 against spreading. When desired, plates 40 may be attached to the bottom and top edges of frames 38 by means of screws 41 and slots 42, or their equivalent, so that pressure which can be applied to lugs 39 by the levers 32 may be varied.

Extending away from the top edge of the mold with one edge resting on the plate 25 is a plate 43. This plate provides a table upon which the concrete extending above the top of a mold, when forming a block, can be struck off by means of the hopper 44 mounted in guides 45 on frame ends 8 and 9.

When it is desired to form solid blocks and the cores 29 are not to be used, openings 26 can be closed by plates 46 mounted on rods 47 by placing the members 46 in openings 26 and passing the rods 47 through the molds, as clearly indicated in Fig. 6. A nut 48 or other desirable means may be used to hold the members 46 in place. When solid blocks are made it is desirable to disconnect the core molds 29 from the levers 32. This can be done by simply unscrewing bolts or screws 33 appearing in Figs. 1, 4 and 5. WVhen it is desired to form hollow blocks again the screws 33 are again placed in their positions indicated so as to connect the connecting links 33 with the levers 32.

In use, the parts of the machine are placed in the positions indicated in Fig. 4 and the concrete placed in the hopper 44 and tamped down in the usual manner. When the form is full, hopper 44 is moved back in its guides 45 over the plate 43 to strike off the top of the block. The levers 32 are then raised to their positions indi cated in Fig. 5 to unlock the ends 23 and the latter are moved to their full positions in Fig. 2 by manipulating lever 16 to free the ends 23 from the block. The plate 20 and pallet 22 are then. tipped over on the pivot red 10 to their positions indicated in Fig: 5

placed on members 19 and the latter moved 3 about their pivots to the position indicated in Fig. 4. The ends 23 are then moved to their closed positions by levers 16 and levers 32 moved down again to lock said ends of the mold. The hopper is then drawn from its position of Fig. 5 to its position of Fig. 4 to bring the material dragged over on plate 43 back over the mold where the material drops into the latter to be used in the next block.

I claim 1. A concrete block machine comprising a mold having movable sides; camson said sides; and adjustable cams adapted to engage the first-mentioned cams for locking the movable block sides against spreading. 2. A concrete block machine comprising a mold having ends adapted to be moved away from each other and a bottom and one side adapted to be moved about a pivotal point adjacent a longitudinal corner of the mold; and levers having cams thereon adapted to engage said movable sides and ends to hold the latter against movements away from each other.

3. A concreate block machine comprising a mold having a bottom wall and a side wall pivotally mounted and end walls slidably mounted; cores adapted for movement into said mold; levers attached to said cores for moving the latter into said mold; and cams mounted on said levers for connection with said side and ends of the mold for holding the latter against spreading.

4. A. concrete block machine comprising a mold having sides with a core opening in one of said sides; and a closure for said core opening adapted for connection with said core for holding the core opening closure in said opening. 7

5. A concrete block machine comprising a mold having a side with a core opening in the latter; a plate of substantially the size of said core opening; a rod attached to said plate and extending through said core adapted to hold said plate in said core opening against the adjacent end of said core;

and adjustable means on said rod for lock a frame; a mold on the frame having paraladapted to engage said lugs for holding the lel movable end Walls; a shaft journaled in end Walls against movements away from the frame; two spaced levers fixed on said each other. V shaft and adapted for movement across the I In testimony whereof I have signed my 5 remote'sides of said end Walls; lugs onsaid name to this specification on this 28th day end walls; and plates adjustahly mounted of February, A. D. 1922.; on the adjacent sides of said levers and ROBT. s. COHOON. Y 

